If your "Geargiarmor" survives being flipped, search for this card, Normal Summon it, and Tribute it to Special Summon "Geargiano". Then Tribute "Geargiano" to revive this card and make a Rank 4 Xyz Monster. This sets up your Graveyard for the second effect of "Gear Gigant X".
Special Summon this card with "Geargiano Mk-II" and use the effect of "Geargiarsenal" to search for "Geargiano" or another "Geargiano Mk-II", then Overlay for a Rank 3 Xyz Monster.
Use this card's effect to avoid losing it to the effect of "Limiter Removal".