Many people don't like the Gaian deck. I don't like it enough to buy it, so I suppose I am in that camp.
I do not personally think in terms of grounding in my own life but I am very elementally-oriented, which is a default connection to the earth. It sounds like you are looking for something that's almost a spell or ritual of sorts, even if you don't use those words.
Here is a spread along those lines:
.........................................7....................................
.............................4..........................5...............................
----------------------- -Ta-- 1 ---Tb--------------------------------------------------------
............................2..........................3..................................
..........................................6................................
* Arrange cards in a circle to represent planet Earth with card #1 and two talismans at the center.
Ta= a talisman to represent you (a hair of yours, a picture of you, an important personal item like a ring)
Tb= a talisman to represent the earth (a piece of clay, or four items to represent the elements like a bird feather or piece of incense or shell, cup of water, etc...)
1- ME-- this card represents you as you currently relate to the Earth/Gaia
2- Earth connection: May I open myself to this sensation or physical experience that I may be more connected and grounded
3- Water connection: May I open myself to this emotion or emotional experience that I may be more connected and grounded
4- Fire connection: May I open myself to this creative or spiritual impulse that I may be more connected and grounded
5- Air connection: May I open myself to this idea or communication that I may be more connected and grounded
6- What I draw from the Earth (a source of strength, security, comfort)
7- How I may give back to the Earth
If all else fails, you can always create your own with a position to represent every step in the specific grounding process you seek.
best of luck