So the current LGBT characters in comics are:
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Amazing X-men. Northstar
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Uncanny X-men. Christopher Deeds
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X-men. Bling! Anole. "Psylocke"
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X-force. Fantomex. "Psylocke"
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Avengers Undercover. Cullen Bloodstone. (maybe Anachronism, down the line)
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Hawkeye. Finch&Marcus
N.B. Psylocke (due to her same-sex relationship with Cluster is put in "")
I never read Apex; so I don't know the full details, but I don't think it makes them transgender. Much like Dallas Riordan/Atlas in Thunderbolts. Sharing a body (if the metaphor isn't explored in terms of gender) doesn't, in my mind, make them transgender.