(1) A proposal for a general purpose intermediate-high resolution IR spectrograph for the GTC / Propuesta para un espectrógrafo IR de resolución intermedia-alta de propósito general para GTC. We will present the conceptual lines to develop an IR spectrograph of high-intermediate dispersion for the GTC, in response of the petition of Letters of Intent. We will briefly discuss the overall features of an instrument of this type and will focus on the science which could be tackled with it. The main objective of this talk is sounding the scientific interest of the IAC researchers for such a proposal and request cooperation for defining the design reference and additional cases over which building the proposal.