Hey, I'm a new player, after hearing some info about underworld trading and companion gifts I grabbed that as one of my Crew Skills.

Now I'm closing in on 700 skill but my mission lists only display Companion gifts upto Grade 4-5, everything higher upto grade 11 only has Cloth and Metal as rewards.

my question is this, are there any higher grade Gift missions? or are they locked behind Gift Vendors/GTN or the Cartel Market?

I've tried googling but available info seems woefully incomplete regarding most crew skills.

No, grade 5 is the highest that gives companion gift missions. There aren't any companion gifts above gift-grade 6 anyway, and the grade 6 gifts are available in "yellow" rarity for an absurdly high price from a mis-named vendor on Odessen, a *woman* called "Silas".

EDIT: Well, at least on Earth, "Silas" is a man's name, after the 1st Century saint sometimes called "Silvanus".

https://en.wikipedia.org/wiki/Silas_(name)