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Is GNU GPL v2.0 or later compatible with GNU Lesser GPL v3.0?

No

GNU GPL v2.0 or later is strong copyleft; combining it into a GNU Lesser GPL v3.0 project would force the combined work to be GNU GPL v2.0 or later (not GNU Lesser GPL v3.0). If your project must remain GNU Lesser GPL v3.0, avoid GNU GPL v2.0 or later code.

About these licenses

LicenseFamilyPatent grant
GNU GPL v2.0 or later (GPL-2.0-or-later) strong-copyleft No (implicit at most)
GNU Lesser GPL v3.0 (LGPL-3.0) weak-copyleft Yes

GNU GPL v2.0 or later: GPL-2.0 with explicit upgrade path; users may pick GPL-2.0 or any later GPL.

GNU Lesser GPL v3.0: Same library-linking permission as LGPL-2.1, with GPLv3's patent provisions inherited.

What to do next

If you found this page because you're trying to figure out whether shipping a particular dependency is safe, the answer above is a starting point — not a substitute for reading the actual licenses or talking to a lawyer when stakes are high.

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