My WW eating out guide has TGI Fridays and a general tex-mex section in, so I guess this will be similar to where you are going. Lowest appetizer is Brocolli cheese soup at 4.5 points (mmm yummy!) or mushrooms at 5 points.
Main course options:
1 chicken burrito - 4.5 points
1 veggie burrito - 3.5 points
1 chicken fajita - 5
fries - 6.5