Method development for chemical separation on GC instrument.

Given: 1. GC instrument 2. polysiloxane column 3. 1mM solution of each of the following compunds in methanol.

Compounds divided into 3 separate groups:

1. Carboxylic Acid:
    a. benzoic acid  b. Phthalic acid  c. Toluic acid

2.  Amino:
    a. aniline  b. 4-aminotoluene  c. ortho-
       pheylenediamine

3.  Amino Carboxylic Acids:
   a. 4-aminobenzoic acid  b. 2-aminobenzoic acid  c.
      4-amino-2-methylbenzoic acid

I need a suggestion on the best Temperature parameters to get good separation for each separate group. Any ideas??