For the magnetic combination the ( N − 1)th Mellin moment ( N - odd) is the the polyno- mial of ξ of order N − 1 The corresponding set of coefficients h g ( M ) N,k ( t ) is expressed through the generalized form factors B g ( M ) nl as follows Gluon GPDs H g ( E,M $^{)}$( x, ξ, t ) are normalized according to: 0 Here M g $_{2}$( t ) stands for the t -dependent momentum fraction carried by gluons in the nucleon; J $^{g}$( t ) denotes the t -dependent fraction of angular momentum carried by gluons and d g $_{1}$( t ) is the first coefficient of Gegenbauer expansion of the gluon D -term (52). To sum up the formal series for the electric and magnetic combinations of gluon GPDs (18), (19) we employ the techniques developed in [15] (see also discussion in [22]). Some of the additional technical details specific for the gluon case are presented in the Appendix A. IV. THE PROPERTIES OF H g ( E,M $^{)}$( x, ξ, t ) IN THE DUAL PARAMETRIZATION To proceed with the summation of the formal series (18), (19) we introduce two sets of gluon forward-like functions G g ( E ) 2 ν and G g ( M ) 2 ν , whose Mellin moments generate electric and magnetic generalized form-factors B g ( E,M ) nl ( t ): B g ( E,M ) nn +1 − 2 $_{ν}$( t ) = ∫ 1 0 dxx $^{n}$G g ( E,M ) 2 ν ( x, t ) . (27) 10 ∫ 1 0 dxH g ( E $^{)}$( x, ξ, t ) = M g $_{2}$( t ) + 4 5 (1 − τ ) d g $_{1}$( t ) ξ $^{2}$; 1 dxH g ( M $^{)}$( x, ξ, t ) = 2 J $^{g}$( t ) . (26) h g ( M ) N,k ( t ) = N ∑ n =1 odd n +1 ∑ l =0 even B g ( M ) nl ( t )( − 1) k + l$_{−}$N +1 2 ( − 1 + k − N ) Γ( 2 − k + l + N 2 ) 3 · 2 k $^{+1}$Γ( 1+ k + l − N 2 ) Γ(2 − k + N ) × n (1 + n ) (2 + n ) (3 + n ) Γ( N ) Γ( 2 − n + N 2 ) Γ( 5+ n + N 2 ) . (25) ∫ 1 0 dxx N − $^{1}$H g ( M $^{)}$( x, ξ, t ) = N − 1 ∑ k =0 even ξ $^{k}$h g ( M ) N,k ( t ) = ξ N N ∑ n =1 odd n +1 ∑ l =0 even B g ( M ) nl ( t ) $_{ξP}$′ l ( 1 ξ ) n (1 + n ) (2 + n ) (3 + n ) Γ( 5 $_{2}$) Γ( N ) 9 · 2 N Γ(1 + − n + N 2 ) Γ( 7 2 + − 2+ n + N 2 ) . (24)