This is for the chronological timeline of the main Gundam Series known as Universal Century (U.C.). All the other Gundam Universes can be watched whenever you wish. If you want to you can always...
Not a recommended watching order list, however all shows on this list except for Gundam Unicorn work as standalone.
Planned watch order for Universal Century ("main series") Gundam.
All complete and incomplete series I own.
Incomplete: Inuyasha, Ranma 1/2, 08th ms team, Pokemon, Votoms, Niea Under 7
There. Chii's list is very helpful, but it's hard finding it XD