Gurdurr's solid natural bulk, adequate movepool, and Guts ability make it a very capable user of a simple Bulk Up set. After a Bulk Up, Gurdurr becomes incredibly tough to break through on the physical side; even powerful attacks such as Choice Band Entei's Flare Blitz and Choice Band Druddigon's Outrage fail to 2HKO Gurdurr at full health. However, without any form of recovery, this becomes a moot point, which is why Drain Punch is the most optimal STAB attack for Gurdurr to use, as this allows Gurdurr to mitigate the damage taken while setting up, as well as giving it the flexibility to take hits afterwards and recover a significant amount of HP in return. Overall, Thunder Punch is the most consistently useful coverage move for Gurdurr, as it allows Gurdurr to comfortably beat Qwilfish and defensive variants of Slowking, prevent dangerous Pokemon such as Moltres from switching in for free, and maintains neutral coverage on the majority of the tier. However, Payback is also an effective option, as despite the fact that Gurdurr becomes noticeably more vulnerable to Pokemon such as Qwilfish and Moltres, it does provide Gurdurr with a method of dealing respectable damage to Psychic-types, such as Mesprit and Uxie, as well as preventing it from being completely walled by Golurk and Rotom. Mach Punch is, of course, a staple for Gurdurr, as it allows it to compensate for its low Speed and prevent stronger special attackers, such as Sceptile and Magmortar, from revenge killing it after they have been worn down enough, in addition to allowing Gurdurr to comfortably check Pokemon such as Zangoose, Tauros, and Shell Smash Omastar.
Due to the fact that Gurdurr is more or less confined to using Bulk Up, Drain Punch, and Mach Punch, or it risks becoming outclassed by the other Fighting-types of the tier, the only flexibility it retains lies in the coverage move it uses. Ice Punch is one option, as it retains solid neutral coverage alongside Drain Punch and remains Gurdurr's best bet at breaking through Amoonguss, but the trade-off of being significantly more vulnerable to Slowking, Qwilfish, and Moltres is often reason enough to avoid it without a very capable defensive core supporting Gurdurr. On the other hand, Rock Slide allows Gurdurr to retain similarly solid neutral coverage while allowing it to more effectively take on Bug-types and OHKO Moltres on the switch, but it doesn't help Gurdurr overcome any of its more traditional defensive counters.
One of the most important partners to consider for Gurdurr is a Pursuit user; due to the fact that the RU tier shelters a plethora of durable Psychic- and Ghost-types—all of whom give Gurdurr headaches—it is nearly mandatory to carry Pursuit support in order to open a window for Gurdurr to sweep. Considering its ability to effectively combat Gallade in addition to other Psychic- and Ghost-types, Spiritomb is often the most optimal teammate for this purpose, but both Absol and Escavalier are also effective in this role if Gallade is already well-covered. However, while most Ghost- and Psychic-types are covered fairly handily by these means, Spiritomb, particularly the defensive set, can prove a difficult obstacle for Gurdurr to overcome, and having teammates to properly capitalize upon it is encouraged; specially based Fire-types, such as Moltres and Magmortar, can comfortably switch into defensive Spiritomb (being immune to Will-O-Wisp and taking minimal damage from Foul Play) and threaten to 2HKO with their STAB attacks, while Roselia can easily set up entry hazards against Spiritomb, recovering the damage it inflicts with Rest. These Pokemon are also very capable of threatening bothersome physical walls, namely Tangrowth and Alomomola, whom impede Gurdurr indefinitely. Slowking makes a quality partner for Gurdurr as well, being capable of stomaching most of the strong specially based attacks aimed at Gurdurr, while in return baiting Dark- and Bug-types for Gurdurr to set up on. Moreover, due to Slowking's versatility as a Pokemon, it is capable of supporting Gurdurr in a variety of ways to benefit the playstyle used, whether it be spreading burns on Psychic-types with Scald, baiting and KOing Tangrowth with Fire Blast, or even opening up a more comfortable sweep for Gurdurr with Trick Room.