It seems that both .srpm and .gtar files are used for installation packages meant for Linux platform, or at least certain distributions. It may be possible to convert one to another using some kind of transforming tool, but it should generally not be used on system specific packages.
Convert Linux Source RPM Package to GNU tar compressed archive.
We have found one software suitable in our database for this conversion.
Linux/Unix software - convert srpm to gtar on Linux
Linux is family of Unix-based operating systems. Linux kernel supports variety of devices such as desktop computers, smart phones, tablet computers, routers, video game consoles etc. Linux is also leading operating system for servers. Linux is available for free in many distributions on the Internet.
Popular distributions for desktops are Ubuntu, Fedora, openSUSE, Debian. For servers are variants of Red Hat, Xandros, Slackware, Debian, SUSE etc.
Operating system for smart phones called Android is also based on Linux. Nokia developed Linux based operating systems for smart phones called MeeGo and Maemo.
Convert from srpm file
to gtar file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.