In this paper we consider Skorohod and Stratonovich-type integrals in a general setting of Gaussian processes. We show that a conversion formula holds when the covariance functions of the Gaussian process are of finite $ρ$-variation for $ρ\geq 1$ and that the diagonals of covariance functions are of finite $ρ'$-variation for $ρ'\geq 1$ such that $\frac{1}{ρ'}+\frac{1}{2ρ}>1$. The difference between the two types of integrals is identified with a Young integral. We also show that the Skorohod integral is the limit of a $[ρ]$-th order Skorohod-Riemann sum.