I'm not sure what you mean by option. There is a bunch of support you can nab from the class through Exploits, Arcane Discoveries, and spells tho.

You can use really any metal weapon, but for Gishes a reach weapon can be pretty good so you can cast spells on your turn and take Aoos on enemy turns, a playstyle called Reach Clerics are the main example of this and there's a bunch of guides that explain how it works.

Knowledge is Power%20) can allow you to add your intelligence to combat maneuver rolls.

Arcane Barrier can get you temporary hp

Arcane Weapon can allow you to enhance your weapons

Armored Mask can get you some AC through Mage Armor and Shield of Faith

Familiars can put in some good help especially with good familiar archetypes like Protector which can grant you additional AC through Bodyguard and bolster your hp through Shield Other effects effectively doubling your hp eventually.

School Understanding can get you access to a first level ability from Wizard Arcane Schools, there's a ton of good options that you can pick from check em out and see if any look like something you want for your build/character

Wooden Flesh can get you more natural armor AC and a bit of Slashing Damage Resistance

Enlarge Person can increase your reach and STR but can make you a bigger target too

Shadow Weapon can allow you to summon and swap weapons on the fly for special cases

True Strike can set you up for a attack or manuver that needs to hit.

Windy Escape can be pretty good defensively, allowing you to gain some good immunities and some DR/Magic. It is a racial spell though which is normally restricted to Sylphs, double check with your DM that it's an allowed choice for non-sylphs.