Which version of PHP GD SEO Toolbox Pro plugin requires?
GD SEO Toolbox Pro plugin requires one of the following PHP versions: 7.0, 7.1, 7.2, 7.3, 7.4, 8.0. The plugin might work with older PHP versions, but they are no longer tested or supported.
Which version of WordPress GD SEO Toolbox Pro plugin requires?
GD SEO Toolbox Pro plugin requires one of the following WordPress versions: 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6. The plugin might work with older WordPress versions, but they are no longer tested or supported.
Which version of ClassicPress (WordPress fork) GD SEO Toolbox Pro plugin requires?
GD SEO Toolbox Pro plugin requires one of the following ClassicPress versions: 1.0, 1.1, 1.2.
Which version of bbPress plugin GD SEO Toolbox Pro plugin requires?
GD SEO Toolbox Pro plugin requires one of the following bbPress plugin versions: 2.5, 2.6.
How old is GD SEO Toolbox Pro plugin?
GD SEO Toolbox Pro plugin is 5 years, 10 months old.
When was GD SEO Toolbox Pro plugin first version released?
GD SEO Toolbox Pro plugin was first released on November 12, 2015.
When was GD SEO Toolbox Pro plugin latest version released?
GD SEO Toolbox Pro plugin latest version 3.5 was released on March 10, 2021.
Where can I find list of changes in all GD SEO Toolbox Pro plugin releases?
The detailed changelog for GD SEO Toolbox Pro plugin is available here: GD SEO Toolbox Pro Changelog.
Is GD SEO Toolbox Pro plugin compatible with BuddyPress plugin?
GD SEO Toolbox Pro plugin supports one of the following BuddyPress plugin versions: . GD SEO Toolbox Pro should work with older BuddyPress versions, but we support only most recent BuddyPress versions.
Is GD SEO Toolbox Pro plugin compatible with WooCommerce plugin?
GD SEO Toolbox Pro plugin supports one of the following WooCommerce plugin versions: . GD SEO Toolbox Pro should work with older WooCommerce versions, but we support only most recent WooCommerce versions.
Can I translate GD SEO Toolbox Pro plugin to my language?

Yes. POT file is provided as a base for translation in the root folder for each plugin. Translation files should go into languages directory, and WordPress must be set to your language to load the file. As an alternative, translation file can go into wp-content/languages/plugins directory.

The file name for translated and compiled MO file must be the same as POT file with the addition of language code: {plugin-name}-{language-code}.mo.

You can check out this for translating plugins using POEdit program:
support.dev4press.com/kb/article/translating-plugins-or-themes-using-poedit

Does GD SEO Toolbox Pro plugin works with WordPress MultiSite installations?

Yes. Each site in the network can activate and use the plugin.