I want to create a .gmt file to use gprofiler on a annotaion on non. model organism

My input file is like this:

gene000016    GO:0005515
gene000021    GO:0005515
gene000027    GO:0044464
gene000010    GO:0005515
gene000011    GO:0015074

And I want to convert it like this:

GO:0005515 NA gene000016 gene000021 gene000010
GO:0044464 NA gene000027
GO:0015074 NA gene000011

So basically putting the GO-term in column 1, some random text in col2 and the genes from col1 in the input file on a line after the go-term.

Is there a way to do it in python?