I have Eclipse 4.4 on my Windows 7. I got the following error when trying to install Google Plugin:
Cannot complete the install because one or more required items could not be found.
Software being installed: Google Plugin for Eclipse 4.3 3.5.1.v201312301723-rel-r43 (com.google.gdt.eclipse.suite.e43.feature.feature.group 3.5.1.v201312301723-rel-r43)
Missing requirement: Google Eclipse 4.2 Platform Plugin 3.5.1.v201312301723-rel-r43 (com.google.gdt.eclipse.platform.e42 3.5.1.v201312301723-rel-r43)
requires 'bundle org.eclipse.core.runtime [3.8.0,3.10.0)' but it could not be found
Cannot satisfy dependency:
From: Google Plugin for Eclipse 4.3 3.5.1.v201312301723-rel-r43 (com.google.gdt.eclipse.suite.e43.feature.feature.group 3.5.1.v201312301723-rel-r43)
To: com.google.gdt.eclipse.platform.e42 [3.5.1.v201312301723-rel-r43]
The plugin has a hard requirement to Eclipse 3.8 (up to to 3.10, which doesn't exist), which means it's not able to install on Eclipse 4. See if there is an updated version of the plugin.
If not, you have to install Eclipse 3.8 to run the plugin. The other alternative is to see if the source is available and change the requirements so that it will be able to install on 4.4. But you will be taking a huge risk and using the software in an environment it wasn't designed or tested for.