My excuse: I am obsessed and I am bored and I have day off. The following are the teams that the Goukaiger can become that have the same colors (Red, Blue, Yellow, Pink, Green), regardless of gender.
Red, Blue, Yellow, Pink, Green
The Goukaiger can become that have the same colors (Red, Blue, Yellow, Pink, Green), regardless of gender. There are 13 teams. 7 teams that Yellow has to be the male ranger. 1 team of the same color teams that Blue has to be female. Goranger, Denjiman, Bioman, Flashman, Dairanger, Ohranger, Carranger, Gingaman, GoGoV, Timeranger, Dekaranger, Magiranger, and Shinkenger.
Teams with Black and/or White
These teams Green has to be Black and/or Pink has to be White. In three cases, Pink has to be white. For Changeman, I figure that Pink will be Pink, Yellow will be White. In 7 cases, Yellow has to be male. GoggleV, Dynaman, Changeman, Maskman, Turboranger, Fiveman, Megaranger, Gaoranger, Boukenger and Goseiger.
Pink as Black or Green or White
These teams started with three and had only one female. This I don't know how they will figure this out. For Abaranger, probably GoukaiGreen will be AbareBlack and Pink might be AbareKiller. In Liveman, GoukaiGreen will probably be Green Sai but he can probably be considered weak and considered by the producers closer to Pink. Green might be made Black Bison and Pink be Green Sai. Who knows, maybe Pink will be Black Bison. Also, Yellow would have to be male and Blue would have to be female. For Go-Onger, same thing where naturally GoukaiGreen would be Go-on Green and Goukai Pink would be Go-On Black, but like I said about producers and machismo and 'weakness.'
Odd or Unique Colors
JAKQ has almost all the same colors, except for Yellow, meaning Goukai Yellow might have to become Big One. In Battle Fever J, Pink might naturally become Miss America and Green become Battle Kenya, meaning Yellow will have no choice to become Battle Cossack, which has an orange suit. For Hurricanger, Yellow would have to be male and Blue would have to be female. Green and Pink would have to be Kabutoraijer and Kuwagataraijer, while Kabutoraijer is considered to be a shade of red, like pink is a shade of red, the closest to a male Pink Ranger. Rumor is Doug Sloan thought of making the Navy Ranger female for Ninja Storm, but then realized it was not necessary. As for Gekiranger, Green and Pink would have to be GekiViolet and GekiChopper, or if Rio and Mele are considered to be part of the 200 heroes, then they will be Black and Green. So Pink could become Chopper and Green be Violet.
Sun Vulcan as mentioned before, two Rangers too short.