Would a girl ever say "I gtg" to a guy she likes when texting?

or does it always mean "I don't Don't have to go but I don't want to talk to you anymore". I got this in the middle of a text convo that was getting pretty heated about her and she was like "ok I gtg" instead of continuing it. So I don't know if she got mad at me or actually had to go
Would a girl ever say "I gtg" to a guy she likes when texting?
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