There exists a canon of Christian scripture. This canon can be divided into three groups: The Hebrew Scriptures, commonly called the Old Testament; the Greek Scriptures, commonly called the New Testament; and the
http://en.wikipedia.org/wiki/Deuterocanonical_books">Deuterocanon, scriptures which come from the Jewish religious tradition but which are not themselves part of the Jewish canon.
All Christian churches accept the same Old and New Testament canons. The historic churches, such as the Orthodox, Roman Catholic and Syrian, have a body of Deuterocanonical works that is largely the same with some variation. The Protestant movement rejected the Deuterocanon to different degrees. Early groups such as the Church of England held that the Deuterocanon was worth reading but should not be used to establish doctrine; latter groups discarded the Deuterocanon entirely.
Your question was about Protestant denominations which "give attention and respect" to gospels which are outside of the accepted New Testament canon. I assert that the historic character of Protestant Christianity requires holding to the accepted Old and New Testament and rejecting canonical status to other works even if they are considered worthy of acknolwedgement. Because of this, I would assert that any group that did give canonical status to anything other than the accepted Old and New Testament could not be classed as Protestant.
There is also the issue that you specify Gospels. I assume by this you mean a work such as the Gospel of Thomas, the Infancy Gospel of James or the Gospel of Judas. Gospels are writings which relate directly to Jesus. Acknowledging such writings as worth reading, much less holding them as canon, would be anathema to the Protestant doctrine of the supremacy of Scripture. Again, I would assert that any group that did "give attention and respect" to a gospel outside of the accepted canon could not be called Protestant.