Provided by: genometools_1.5.10+ds-2_amd64 

NAME
gt-merge - Merge sorted GFF3 files in sorted fashion.
SYNOPSIS
gt merge [option ...] [GFF3_file ...]
DESCRIPTION
-retainids [yes|no]
when available, use the original IDs provided in the source file (memory consumption is proportional
to the input file size(s)) (default: no)
-tidy [yes|no]
try to tidy the GFF3 files up during parsing (default: no)
-o [filename]
redirect output to specified file (default: undefined)
-gzip [yes|no]
write gzip compressed output file (default: no)
-bzip2 [yes|no]
write bzip2 compressed output file (default: no)
-force [yes|no]
force writing to output file (default: no)
-help
display help and exit
-version
display version information and exit
REPORTING BUGS
Report bugs to https://github.com/genometools/genometools/issues.
GenomeTools 1.5.10 12/08/2017 GT-MERGE(1)