Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
gtest-devel
gtest-devel(x86-64)

Requires :

gtest = 1.8.0-5.el8
libgtest.so.1.8.0()(64bit)
libgtest_main.so.1.8.0()(64bit)
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsXz) <= 5.2-1

Content of RPM :
/usr/include/gtest
/usr/include/gtest/gtest-death-test.h
/usr/include/gtest/gtest-message.h
/usr/include/gtest/gtest-param-test.h
/usr/include/gtest/gtest-param-test.h.pump
/usr/include/gtest/gtest-printers.h
/usr/include/gtest/gtest-spi.h
/usr/include/gtest/gtest-test-part.h
/usr/include/gtest/gtest-typed-test.h
/usr/include/gtest/gtest.h
/usr/include/gtest/gtest_pred_impl.h
/usr/include/gtest/gtest_prod.h
/usr/include/gtest/internal
/usr/include/gtest/internal/custom
/usr/include/gtest/internal/custom/gtest-port.h
/usr/include/gtest/internal/custom/gtest-printers.h
/usr/include/gtest/internal/custom/gtest.h
/usr/include/gtest/internal/gtest-death-test-internal.h
/usr/include/gtest/internal/gtest-filepath.h
/usr/include/gtest/internal/gtest-internal.h
/usr/include/gtest/internal/gtest-linked_ptr.h
/usr/include/gtest/internal/gtest-param-util-generated.h
/usr/include/gtest/internal/gtest-param-util-generated.h.pump
/usr/include/gtest/internal/gtest-param-util.h
/usr/include/gtest/internal/gtest-port-arch.h
/usr/include/gtest/internal/gtest-port.h
/usr/include/gtest/internal/gtest-string.h
/usr/include/gtest/internal/gtest-tuple.h
/usr/include/gtest/internal/gtest-tuple.h.pump
/usr/include/gtest/internal/gtest-type-util.h
There is 55 files more in these RPM.