The official Revive system, when set to require First Aid Kits and Medikits, does not recognize valid medical items that have been added by optional addons, including Global Mobilization. If you try to revive a downed player with these items, the action does not show up, so you cannot revive them. This effectively makes Revive incompatible with Global Mobilization.
This is because the condition for the action checks CAN_USE_MEDIKIT2 and CAN_USE_FAK2 in \a3\functions_f_mp_mark\Revive\defines.inc, which explicitly check for the "FirstAidKit" and "Medikit" vanilla medical items. This should be changed to a generic check for any valid medical items (ItemInfo >> type is 401 or 619, I believe?). _addAction_revive.inc should also be updated to remove the correct item.
Behavior was observed in 1.98.146373 and the GM 1.2 update. No mods (besides GM) were loaded.