Looking for a fork cap tool for the GP Suspension cartridges (older version). Please let me know what you have!
As long as the caps weren't run on with a 1/2" impact gun a pin spanner will work just fine. Motion Pro makes one that's fairly universal.
You don't really need any kind of "special" tool for GP or Ohlins (and probably a few others) cap. You can pick up an adjustable pin wrench from Harbor Freight for $5 https://www.harborfreight.com/adjustable-pin-wrench-36554.html I've been using these to open up my Ohlins caps for years, works great.
Hell yes, I am about to grab one or two of those from the Harbor Freight down the road tomorrow. Thank you sir, hopefully OP can do the same.